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http://dx.doi.org/10.6111/JKCGCT.2022.32.2.068

Mechanism of change in compressive strength of geopolymers by immersion method  

Kim, Hakmin (Department of Materials Engineering, Kyonggi University)
Kim, Yootaek (Department of Materials Engineering, Kyonggi University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.32, no.2, 2022 , pp. 68-76 More about this Journal
Abstract
This study was performed to investigate the mechanism of the change in compressive strength of autoclave cured geopolymers. Specimens were immerged in distilled water, 2M, 8M, and 14M alkaline solutions for 3, 7, and 21 days. The change in the specimens immersed in a short period of time was not significant, but the compressive strength of the specimens immersed in the distilled water and 8M alkali solution) for 21 days increased more than twice as much as before immersion because of additional geopolymerization. However, compressive strength decreased due to the alkaline aggregate reaction when alkaline solution was supplied more than a certain level of concentration. Therefore, immersing the specimens for more than 21 days in the distilled water or 8M alkaline solution would be desirable for the improvement of compressive strength of autoclave cured specimens.
Keywords
Geopolymer; Immersion; Alkali solution; Mechanism; Autoclave; Curing; Aging; IGCC slag; Si sludge;
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Times Cited By KSCI : 2  (Citation Analysis)
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